# 2013-09-05
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
# 
# Test cases for query planning decisions and the likely(), unlikely(), and
# likelihood() functions.

set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix whereG

do_execsql_test whereG-1.0 {
  CREATE TABLE composer(
    cid INTEGER PRIMARY KEY,
    cname TEXT
  );
  CREATE TABLE album(
    aid INTEGER PRIMARY KEY,
    aname TEXT
  );
  CREATE TABLE track(
    tid INTEGER PRIMARY KEY,
    cid INTEGER REFERENCES composer,
    aid INTEGER REFERENCES album,
    title TEXT
  );
  CREATE INDEX track_i1 ON track(cid);
  CREATE INDEX track_i2 ON track(aid);
  INSERT INTO composer VALUES(1, 'W. A. Mozart');
  INSERT INTO composer VALUES(2, 'Beethoven');
  INSERT INTO composer VALUES(3, 'Thomas Tallis');
  INSERT INTO composer VALUES(4, 'Joseph Hayden');
  INSERT INTO composer VALUES(5, 'Thomas Weelkes');
  INSERT INTO composer VALUES(6, 'J. S. Bach');
  INSERT INTO composer VALUES(7, 'Orlando Gibbons');
  INSERT INTO composer VALUES(8, 'Josquin des Prés');
  INSERT INTO composer VALUES(9, 'Byrd');
  INSERT INTO composer VALUES(10, 'Francis Poulenc');
  INSERT INTO composer VALUES(11, 'Mendelsshon');
  INSERT INTO composer VALUES(12, 'Zoltán Kodály');
  INSERT INTO composer VALUES(13, 'Handel');
  INSERT INTO album VALUES(100, 'Kodály: Missa Brevis');
  INSERT INTO album VALUES(101, 'Messiah');
  INSERT INTO album VALUES(102, 'Missa Brevis in D-, K.65');
  INSERT INTO album VALUES(103, 'The complete English anthems');
  INSERT INTO album VALUES(104, 'Mass in B Minor, BWV 232');
  INSERT INTO track VALUES(10005, 12, 100, 'Sanctus');
  INSERT INTO track VALUES(10007, 12, 100, 'Agnus Dei');
  INSERT INTO track VALUES(10115, 13, 101, 'Surely He Hath Borne Our Griefs');
  INSERT INTO track VALUES(10129, 13, 101, 'Since By Man Came Death');
  INSERT INTO track VALUES(10206, 1, 102, 'Agnus Dei');
  INSERT INTO track VALUES(10301, 3, 103, 'If Ye Love Me');
  INSERT INTO track VALUES(10402, 6, 104, 'Domine Deus');
  INSERT INTO track VALUES(10403, 6, 104, 'Qui tollis');
} {}
do_eqp_test whereG-1.1 {
  SELECT DISTINCT aname
    FROM album, composer, track
   WHERE unlikely(cname LIKE '%bach%')
     AND composer.cid=track.cid
     AND album.aid=track.aid;
} {composer*track*album}
do_execsql_test whereG-1.2 {
  SELECT DISTINCT aname
    FROM album, composer, track
   WHERE unlikely(cname LIKE '%bach%')
     AND composer.cid=track.cid
     AND album.aid=track.aid;
} {{Mass in B Minor, BWV 232}}

do_eqp_test whereG-1.3 {
  SELECT DISTINCT aname
    FROM album, composer, track
   WHERE likelihood(cname LIKE '%bach%', 0.5)
     AND composer.cid=track.cid
     AND album.aid=track.aid;
} {/.*track.*composer.*album.*/}
do_execsql_test whereG-1.4 {
  SELECT DISTINCT aname
    FROM album, composer, track
   WHERE likelihood(cname LIKE '%bach%', 0.5)
     AND composer.cid=track.cid
     AND album.aid=track.aid;
} {{Mass in B Minor, BWV 232}}

do_eqp_test whereG-1.5 {
  SELECT DISTINCT aname
    FROM album, composer, track
   WHERE cname LIKE '%bach%'
     AND composer.cid=track.cid
     AND album.aid=track.aid;
} {/.*track.*(composer.*album|album.*composer).*/}
do_execsql_test whereG-1.6 {
  SELECT DISTINCT aname
    FROM album, composer, track
   WHERE cname LIKE '%bach%'
     AND composer.cid=track.cid
     AND album.aid=track.aid;
} {{Mass in B Minor, BWV 232}}

do_eqp_test whereG-1.7 {
  SELECT DISTINCT aname
    FROM album, composer, track
   WHERE cname LIKE '%bach%'
     AND unlikely(composer.cid=track.cid)
     AND unlikely(album.aid=track.aid);
} {/.*track.*(composer.*album|album.*composer).*/}
do_execsql_test whereG-1.8 {
  SELECT DISTINCT aname
    FROM album, composer, track
   WHERE cname LIKE '%bach%'
     AND unlikely(composer.cid=track.cid)
     AND unlikely(album.aid=track.aid);
} {{Mass in B Minor, BWV 232}}

do_test whereG-2.1 {
  catchsql {
    SELECT DISTINCT aname
      FROM album, composer, track
     WHERE likelihood(cname LIKE '%bach%', -0.01)
       AND composer.cid=track.cid
       AND album.aid=track.aid;
  }
} {1 {second argument to likelihood() must be a constant between 0.0 and 1.0}}
do_test whereG-2.2 {
  catchsql {
    SELECT DISTINCT aname
      FROM album, composer, track
     WHERE likelihood(cname LIKE '%bach%', 1.01)
       AND composer.cid=track.cid
       AND album.aid=track.aid;
  }
} {1 {second argument to likelihood() must be a constant between 0.0 and 1.0}}
do_test whereG-2.3 {
  catchsql {
    SELECT DISTINCT aname
      FROM album, composer, track
     WHERE likelihood(cname LIKE '%bach%', track.cid)
       AND composer.cid=track.cid
       AND album.aid=track.aid;
  }
} {1 {second argument to likelihood() must be a constant between 0.0 and 1.0}}

# Commuting a term of the WHERE clause should not change the query plan
#
do_execsql_test whereG-3.0 {
  CREATE TABLE a(a1 PRIMARY KEY, a2);
  CREATE TABLE b(b1 PRIMARY KEY, b2);
} {}
do_eqp_test whereG-3.1 {
  SELECT * FROM a, b WHERE b1=a1 AND a2=5;
} {/.*SCAN TABLE a.*SEARCH TABLE b USING INDEX .*b_1 .b1=..*/}
do_eqp_test whereG-3.2 {
  SELECT * FROM a, b WHERE a1=b1 AND a2=5;
} {/.*SCAN TABLE a.*SEARCH TABLE b USING INDEX .*b_1 .b1=..*/}
do_eqp_test whereG-3.3 {
  SELECT * FROM a, b WHERE a2=5 AND b1=a1;
} {/.*SCAN TABLE a.*SEARCH TABLE b USING INDEX .*b_1 .b1=..*/}
do_eqp_test whereG-3.4 {
  SELECT * FROM a, b WHERE a2=5 AND a1=b1;
} {/.*SCAN TABLE a.*SEARCH TABLE b USING INDEX .*b_1 .b1=..*/}

# Ticket [1e64dd782a126f48d78c43a664844a41d0e6334e]:
# Incorrect result in a nested GROUP BY/DISTINCT due to the use of an OP_SCopy
# where an OP_Copy was needed.
#
do_execsql_test whereG-4.0 {
  CREATE TABLE t4(x);
  INSERT INTO t4 VALUES('right'),('wrong');
  SELECT DISTINCT x
   FROM (SELECT x FROM t4 GROUP BY x)
   WHERE x='right'
   ORDER BY x;
} {right}

#-------------------------------------------------------------------------
# Test that likelihood() specifications on indexed terms are taken into 
# account by various forms of loops.
#
#   5.1.*: open ended range scans
#   5.2.*: skip-scans
#
reset_db

do_execsql_test 5.1 {
  CREATE TABLE t1(a, b, c);
  CREATE INDEX i1 ON t1(a, b);
}
do_eqp_test 5.1.2 {
  SELECT * FROM t1 WHERE a>?
} {SEARCH TABLE t1 USING INDEX i1 (a>?)}
do_eqp_test 5.1.3 {
  SELECT * FROM t1 WHERE likelihood(a>?, 0.9)
} {SCAN TABLE t1}
do_eqp_test 5.1.4 {
  SELECT * FROM t1 WHERE likely(a>?)
} {SCAN TABLE t1}

do_test 5.2 {
  for {set i 0} {$i < 100} {incr i} {
    execsql { INSERT INTO t1 VALUES('abc', $i, $i); }
  }
  execsql { INSERT INTO t1 SELECT 'def', b, c FROM t1; }
  execsql { ANALYZE }
} {}
do_eqp_test 5.2.2 {
  SELECT * FROM t1 WHERE likelihood(b>?, 0.01)
} {SEARCH TABLE t1 USING INDEX i1 (ANY(a) AND b>?)}
do_eqp_test 5.2.3 {
  SELECT * FROM t1 WHERE likelihood(b>?, 0.9)
} {SCAN TABLE t1}
do_eqp_test 5.2.4 {
  SELECT * FROM t1 WHERE likely(b>?)
} {SCAN TABLE t1}

ifcapable stat4 {
  do_eqp_test 5.3.1.stat4 {
    SELECT * FROM t1 WHERE a=?
  } {SCAN TABLE t1}
} else {
  do_eqp_test 5.3.1 {
    SELECT * FROM t1 WHERE a=?
  } {SEARCH TABLE t1 USING INDEX i1}
}
do_eqp_test 5.3.2 {
  SELECT * FROM t1 WHERE likelihood(a=?, 0.9)
} {SCAN TABLE t1}
do_eqp_test 5.3.3 {
  SELECT * FROM t1 WHERE likely(a=?)
} {SCAN TABLE t1}

# 2015-06-18
# Ticket [https://www.sqlite.org/see/tktview/472f0742a1868fb58862bc588ed70]
#
do_execsql_test 6.0 {
  DROP TABLE IF EXISTS t1;
  CREATE TABLE t1(i int, x, y, z);
  INSERT INTO t1 VALUES (1,1,1,1), (2,2,2,2), (3,3,3,3), (4,4,4,4);
  DROP TABLE IF EXISTS t2;
  CREATE TABLE t2(i int, bool char);
  INSERT INTO t2 VALUES(1,'T'), (2,'F');
  SELECT count(*) FROM t1 LEFT JOIN t2 ON t1.i=t2.i AND bool='T';
  SELECT count(*) FROM t1 LEFT JOIN t2 ON likely(t1.i=t2.i) AND bool='T';
} {4 4}

# 2015-06-20
# Crash discovered by AFL
#
do_execsql_test 7.0 {
  DROP TABLE IF EXISTS t1;
  CREATE TABLE t1(a, b, PRIMARY KEY(a,b));
  INSERT INTO t1 VALUES(9,1),(1,2);
  DROP TABLE IF EXISTS t2;
  CREATE TABLE t2(x, y, PRIMARY KEY(x,y));
  INSERT INTO t2 VALUES(3,3),(4,4);
  SELECT likely(a), x FROM t1, t2 ORDER BY 1, 2;
} {1 3 1 4 9 3 9 4}
do_execsql_test 7.1 {
  SELECT unlikely(a), x FROM t1, t2 ORDER BY 1, 2;
} {1 3 1 4 9 3 9 4}
do_execsql_test 7.2 {
  SELECT likelihood(a,0.5), x FROM t1, t2 ORDER BY 1, 2;
} {1 3 1 4 9 3 9 4}
do_execsql_test 7.3 {
  SELECT coalesce(a,a), x FROM t1, t2 ORDER BY 1, 2;
} {1 3 1 4 9 3 9 4}

# 2019-08-22
# Ticket https://www.sqlite.org/src/info/7e07a3dbf5a8cd26
#
do_execsql_test 8.1 {
  DROP TABLE IF EXISTS t0;
  CREATE TABLE t0 (c0);
  INSERT INTO t0(c0) VALUES ('a');
  SELECT LIKELY(t0.rowid) <= '0' FROM t0;
} {1}
do_execsql_test 8.2 {
  SELECT * FROM t0 WHERE LIKELY(t0.rowid) <= '0';
} {a}
do_execsql_test 8.3 {
  SELECT (t0.rowid) <= '0' FROM t0;
} {0}
do_execsql_test 8.4 {
  SELECT * FROM t0 WHERE (t0.rowid) <= '0';
} {}
do_execsql_test 8.5 {
  SELECT unlikely(t0.rowid) <= '0', likelihood(t0.rowid,0.5) <= '0' FROM t0;
} {1 1}
do_execsql_test 8.6 {
  SELECT * FROM t0 WHERE unlikely(t0.rowid) <= '0';
} {a}
do_execsql_test 8.7 {
  SELECT * FROM t0 WHERE likelihood(t0.rowid, 0.5) <= '0';
} {a}
do_execsql_test 8.8 {
  SELECT unlikely(t0.rowid <= '0'),
         likely(t0.rowid <= '0'),
         likelihood(t0.rowid <= '0',0.5)
    FROM t0;
} {0 0 0}
do_execsql_test 8.9 {
  SELECT * FROM t0 WHERE unlikely(t0.rowid <= '0');
} {}
do_execsql_test 8.10 {
  SELECT * FROM t0 WHERE likelihood(t0.rowid <= '0', 0.5);
} {}

# 2019-12-31: assertion fault discovered by Yongheng's fuzzer.
# Harmless memIsValid() due to the code generators failure to
# release the registers used by OP_ResultRow.
#
do_execsql_test 9.10 {
  DROP TABLE IF EXISTS t1;
  CREATE TABLE t1(a, b FLOAT);
  INSERT INTO t1(a) VALUES(''),(NULL),('X'),(NULL);
  SELECT coalesce(max(quote(a)),10) FROM t1 GROUP BY a;
} {NULL '' 'X'}

# 2020-06-14: assert() changed back into testcase()
# ticket 9fb26d37cefaba40
#
reset_db
do_execsql_test 10.1 {
  CREATE TABLE a(b TEXT);  INSERT INTO a VALUES(0),(4),(9);
  CREATE TABLE c(d NUM);
  CREATE VIEW f(g, h) AS SELECT b, 0 FROM a UNION SELECT d, d FROM c;
  SELECT g = g FROM f GROUP BY h;
} {1}

finish_test
